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3. 传感器
speed sensors : type GE12x
NORIS A.C. tachogenerators of the Series GE.. are maintenance-free speed-measuring devices using permanent-magnet excitation.
They are designed to provide an A.C. voltage signal that is proportional to a speed of their drive shaft. It is possible to use either voltage or frequency as the measured variable.
Tachogenerators are used where a direct supply is desired for indicating instruments, monitoring or processing devices. Drive is either direct from the take-off shaft by means of couplings or indirectly via belt-and-pulley or friction wheel arrangements. Tachogenerators are working without operating voltage.
主要特点 • Heavy-duty tachogenerator • Straightforward application • Suitable for extremely rigorous operating conditions • NORIS tachogenerators are maintenance-free • Rugged construction • A.C. voltage output • Meets CE requirements • Noise-immune signal transmission • No radio interference • Direct or indirect drive possible • Protection class: IP66 (from 3000 rpm up: IP54) • Choice of mechanical connections for speed sensing • Flanges and brackets available for mounting • Suitable evaluation devices available
GENERAL NOTES ON TYPE GE120-.., GE121-.., GE122-.. Method of operation The drive shaft rotates a permanent magnet in a stationary conductor and induces a voltage in the latter whose amount and frequency are proportional to the speed of the drive shaft. The GE12x-.. is of 12 the pole type having 6 pairs of poles so that the frequency of the alternating voltage is 1/10 of the input speed.
Details • There are three speed-range variants available of this series: • GE120 for full-scale speed range 60 ... 1,000 rpm • GE121 for full-scale speed range 150 ... 2,500 rpm • GE122 for full-scale speed range 500 ... 6,000 rpm • Electrical termination by screw terminals • Output is an approximately sinusoidal A.C. voltage • High electric output for multiple indicator operation • Extremely long life through extra-sturdy suspension of drive shaft • Direct drive possible via fl exible couplings • Indirect drive possible via V-belt pulleys or friction wheels • Wheels or pulleys can be mounted directly on the shaft • Extremely high protection class (up to 3,000 rpm) and rugged construction
4. QWB12型脉冲气压喷雾水枪
QWB12型脉冲气压喷雾水枪
脉冲气压喷雾水枪是一种背负式雾化水消防灭火装置。它是利用压缩空气瞬间释放产生的极大动能，使空气与液体灭火介质（如清水）在毫秒量级时间内互相冲撞混合，经喷嘴加速后，突然膨胀雾化，瞬时喷射，产生高速度、高密度的超细水雾流，直达火源根部，集吹断、窒息、冷却三种灭火机理于一体，错那个人达到高效快速灭火的目的。它是空气动力技术在消防灭火领域的新的应用。
产品特点
l 效能高：由于雾化颗粒小，有效覆盖面的大，同样的灭火介质，灭火面积可达5倍以上。
l 威力大：由于在毫秒量级别时间内释放个大气压，使枪口水雾流平均速度达120米/秒，冲击力极大，可实现瞬间灭火。
l 无污染，节能源：用廉价的水和空气作灭火原料，不但无毒无害无污染，而且使用和维护的成本极低。
l 机动性强：全套装置重量比不足35公斤，装配时间极短利于消防队员掀起到达火场，对阻止初期火灾的扩展，效果尤为明显。
l 适用范围广：既能灭固体火，也能灭液体火和气体火，对五万伏以下的电气火灾在一米以外也能安全扑灭。
技术参数
型号
QWB12
装载总质量